ChannelMaster makes some great antennas. Check out their website:
[Link: channelmaster.com]The Terk you mention is a glitzy, over-priced, antenna that gives so-so performance considering the price.
One thing to keep in mind when choosing an antenna, is to consider the distance to the transmitting tower on the station you are trying to receive, and topographical location of the antenna installation site. (your residence, surrounding structures, and foliage)
ChannelMaster's website has a lot of information to help you choose the appropriate antenna.
JJP